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Open Engineering

formerly Central European Journal of Engineering

Editor-in-Chief: Ritter, William

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CiteScore 2017: 0.70

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2391-5439
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Bond strength of epoxy coated bar splices confined with nominal lateral reinforcement

Krishnamurthy Pandurangan / Gangolu Rao
Published Online: 2012-12-29 | DOI: https://doi.org/10.2478/s13531-012-0044-y

Abstract

Fusion bonded epoxy coating is one of the methods used to protect steel against corrosion. The primary objective of this research reported in this paper is to evaluate the bond strength of epoxy coated bar splices confined with lateral reinforcement. Six full scale beams specimens, designed to fail in bond- splitting mode, were tested in positive bending. Each beam was reinforced with bars spliced in the constant moment region at mid span. The main variables were the amount of transverse reinforcement in the splice region and the coating to the bar. Test results indicate that transverse reinforcement improves the bond strength of coated bars and the ductility of the beams. The bond strength of coated bars is 93%, 72% and 59% of uncoated bars for confinement indices of 1.8, 1.4 and 1.26 respectively. Moreover, a bond reduction factor of 1.35 is suggested for use in code in place of 1.5,when the confinement index is greater than 1.4.

Keywords: Bond strength; Epoxy coating; Splicing; Lateral confinement; Crack width; Confinement index

  • [1] Treece R.A., Jirsa J.O., Bond strength of epoxy-coated reinforcing bars, ACI Material Journal, 1989, 86, 167–174 Google Scholar

  • [2] Cairns J., Abdullah R., Fundamental tests on the effect of epoxy coating on bond strength, ACI Material Journal, 1994, 91, 331–338 Google Scholar

  • [3] ACI Committee 408R., Bond and development of straight reinforcing bars in tension, American Concrete Institute, Detroit, USA, 2003 Google Scholar

  • [4] Azizinamini A., Pavel R., Hatfield E., Ghosh S.K.,Behaviour of spliced reinforcing bars embedded in high-strength concrete, ACI Structural Journal, 1999, 96, 826–835 Google Scholar

  • [5] Harajli M.H., Comparison of bond strength of steel bars in normal and high strength concrete, ASCE Journal of Materials in Civil Engineering, 2004, 16, 365–374 http://dx.doi.org/10.1061/(ASCE)0899-1561(2004)16:4(365)CrossrefGoogle Scholar

  • [6] Hamed B.S., Rteil A.A., Comparison of roles of FRP sheets, stirrups and steel fibres in confining bond critical regions, ASCE Journal of Composites for Construction, 2006, 10, 330–336 http://dx.doi.org/10.1061/(ASCE)1090-0268(2006)10:4(330)CrossrefGoogle Scholar

  • [7] Swamy R.N., Epoxy coated rebars-the panacea for steel corrosion in concrete, Construction and Building Materials, 1989, 3, 86–91 http://dx.doi.org/10.1016/S0950-0618(89)80006-6CrossrefGoogle Scholar

  • [8] Hester C.J., Salamizavareh S., Darwin D., Mc Cabe S.L., Bond of epoxy-coated reinforcement: Splices, ACI Structural Journal, 1993, 90, 89–102 Google Scholar

  • [9] Choi O.C., Ghaffari H.H., Darwin D., Mc Cabe S.L., Bond of epoxy-coated reinforcement: Bar parameters, ACI Materials Journal, 1991, 88, 207–217 Google Scholar

  • [10] Hamad B.S., Jirsa J.O., Strength of epoxy coated reinforcing bar splices confined with transverse reinforcement, ACI Structural Journal, 1993, 90, 77–88 Google Scholar

  • [11] Abrishami H.H,, Cook W.D., Mitchell D., Influence of epoxy-coated reinforcement on response of normal and high strength concrete beams, ACI Structural Journal, 1995, 92, 157–166 Google Scholar

  • [12] Idun E.K., Darwin D., Bond of epoxy coated reinforcement: Coefficient of friction and rib face angle, ACI Structural Journal, 1999, 96, 609–615 Google Scholar

  • [13] Cairns J., Abdullah R.B., Influence of rib geometry on strength of epoxy-coated reinforcement, ACI Structural Journal, 1995, 92, 23–27 Google Scholar

  • [14] ACI Committee 318, Building code requirement for reinforced concrete and commentary (ACI-318-05), American Concrete Institute, Detroit, USA, 1995 Google Scholar

  • [15] AASTHO Highway sub-committee on bridges and structures, Standard specification for Highway bridges, 14th ed., American Association of state Highway and Transportation Officials, Washington, DC, USA, 1989 Google Scholar

  • [16] IS 10262-2009, Recommended guidelines for concrete mix design, Bureau of Indian Standards, New Delhi, India, 2009 Google Scholar

  • [17] IS 12269-1987, Specification for 53 grade ordinary port-land cement, Bureau of Indian Standards, New Delhi, India, 1987 Google Scholar

  • [18] IS 383-1970, Specification for coarse and fine aggregates from natural sources for concrete (Second Revision), Bureau of Indian Standards, New Delhi, India, 1970 Google Scholar

  • [19] IS 1786-2008, Specification for high strength deformed steel bars and wires for concrete reinforcement, Bureau of Indian standards, New Delhi, India, 2008 Google Scholar

  • [20] IS 13620-1993, Specification for fusion bonded epoxy coated reinforcing bars, Bureau of Indian Standards, New Delhi, India, 1993 Google Scholar

  • [21] Pandurangan K., Experimental studies on effect of fusion bonded epoxy-coated bars on bond and cracking behavior of reinforced concrete, PhD thesis, Indian Institute of Technology Madras, Chennai, India, 2010. Google Scholar

  • [22] Orangun C.O., Jirsa J.O., Breen J.E., Re-evaluation of test data on development length and splices, ACI Journal, 1977, 74, 114–122 Google Scholar

About the article

Published Online: 2012-12-29

Published in Print: 2013-03-01


Citation Information: Open Engineering, Volume 3, Issue 1, Pages 145–155, ISSN (Online) 2391-5439, DOI: https://doi.org/10.2478/s13531-012-0044-y.

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© 2012 Versita Warsaw. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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